HOW TO MEASURE THE CORE

Measure A Solder-On Radiator Core

Core Height (A)  -  This measurement is always between the two tanks from header to header or we can say on the length of the tube.

Core Width (B) - This measurement is between the side plates or across the tubes and does not include the side plates

Core Thickness (C) -  This measurement depends on how many tube rows are present in the radiator. An easy way to measure thickness is by inserting a wire through the fins until flush with the core. Mark the other end of the wire and measure the wire.

RADIATOR TYPES AND CONFIGURATION

The downflow radiator is designed so coolant flows from the top tank to the bottom tank.

Tubes are mounted vertically.

Measuring A Charge Air Cooler Core

A Charge Air Cooler core looks similar to a radiator core, however, they need to be measured in a different manner. 

A Charge Air Cooler core WIDTH is defined as the space between the tanks, measured from header plate to header plate.  The HEIGHT is defined as the measurement from the top side of the core to the bottom side of the core (see diagram to the right)